Why is Saturday stronger than Monday?

Two old friends, Jack and Jill, meet after a long time, and discussing as:

Jack: Hey, how are you, man?

Bill: Not bad, got married and I have three kids now.

Jack: That's awesome. How old are they?

Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.

Jack: Cool..But I still don't know.

Bill: My eldest kid just started taking piano lessons.

Jack: Oh, now I get it.

How old are Bill's kids?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Can you identify the hidden rebus in the image below?

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

What building has the most stories?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?